body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    
    background: url('img/background.png') no-repeat right 2.5vh bottom fixed;
    background-size: 70vh;
    min-height: 100vh;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    max-width: 800px;
    width: 100%;
    box-sizing: border-box;
}

h1 {
    color: #2c3e50;
    font-size: 24px;
    margin-bottom: 20px;
    text-align: center;
}

.step-box {
    border-left: 4px solid #3498db;
    background-color: #ecf0f1;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 0 4px 4px 0;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
    width: 100%;
    margin-top: 10px;
}

button:hover {
    background-color: #2980b9;
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

/* Contenitore della revisione e dell'iframe */
#anteprima-revisione {
    margin-top: 20px;
    padding: 15px;
    border: 1px dashed #3498db;
    background-color: #fdfefe;
    border-radius: 4px;
}

.pdf-viewer-container {
    margin-top: 15px;
    width: 100%;
    height: 500px; /* Altezza del visualizzatore PDF */
    border: 1px solid #ccc;
    border-radius: 4px;
    overflow: hidden;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.status {
    font-weight: bold;
    color: #27ae60;
    text-align: center;
    margin-bottom: 15px;
}

.flex-form {
    display: flex;
    gap: 15px;
    width: 100%;
    margin-bottom: 0;
}

.campo-errore {
    border: 2px solid #ef4444 !important;
    background-color: #fef2f2;
}

.input-form {
    width: 100%; 
    padding: 10px; 
    margin-bottom: 10px; 
    box-sizing: border-box; 
    border-radius: 4px; 
    border: 1px solid #ccc;
}